Method of controlling air blower of fuel cell vehicle

Patent metadata

Field	Value
Publication number	US-2016123340-A1
Application number	US-201514701045-A
Country	US
Kind code	A1
Filing date	Apr 30, 2015
Priority date	Nov 3, 2014
Publication date	May 5, 2016
Grant date	—

Abstract

A method for controlling an air blower of a fuel cell vehicle includes operating the air blower with a low limit revolutions per minute (RPM), which is calculated based on a vehicle hill-climbing gradient during hill-climbing, without regenerative braking. Accordingly, when reacceleration and additional acceleration are required during hill climbing of the fuel cell vehicle, the fuel cell vehicle ensures high responsibility and launching characteristics.

First claim

What is claimed is:

1 . A method for controlling an air blower of a fuel cell vehicle, the method comprising:
operating the air blower with a low limit revolutions per minute (RPM), which is calculated based on a vehicle hill-climbing gradient during hill-climbing, without regenerative braking.

2 . The method according to claim 1 , wherein the low limit RPM, which is an RPM of the air blower for supplying an air flow to satisfy a required current of a motor, is calculated according to Math Formula below:

P
Req_Motor

=

R
Tire

G
r

·
M
·
g
·

sin


(

arctan


(

gradient
100

)

)

·
w





l
Req_Motor

=

(

P
Req_Motor

)

/

(

V
Stack

)

[

Math



Formula

]

Wherein R Tire is a radius of a tire, Gr is a gear rate, M is an empty vehicle weight, g is a gravitational acceleration, and w is a current motor angular velocity.

3 . The method according to claim 1 , wherein a controller calculates the low limit RPM, checks the gradient through a gradient sensor, and calculates a current vehicle velocity and the angular velocity of the driving motor through an RPM of the driving motor.

4 . A method for controlling an air blower of a fuel cell vehicle, the method comprising:
calculating a low limit RPM of the air blower when the vehicle travels on a hill under a predetermined driving condition.

5 . The method according to claim 4 , further comprising:
prohibiting regenerative braking through the air blower included in the vehicle when the vehicle travels on the hill.

6 . The method according to claim 4 , further comprising:
determining whether the vehicle travels on the hill under the predetermined driving condition prior to the step of calculating the low limit RPM of the air blower.

7 . The method according to claim 4 , wherein the predetermined driving condition corresponds to a state in which a vehicle velocity is greater than a reference vehicle velocity, a vehicle hill-climbing gradient is greater than a reference gradient, and an accelerator pedal and a brake pedal included in the vehicle are not manipulated.

8 . The method according to claim 4 , further comprising:
generating regenerative braking through the air blower when the vehicle does not travel under the predetermined driving condition.

9 . The method according to claim 4 , further comprising:
determining whether a current RPM of the air blower is greater than the low limit RPM.

10 . The method according to claim 9 , wherein the air blower is controlled to operate with the low limit RPM when the current RPM of the air blower is smaller than the low limit RPM.

11 . The method according to claim 9 , wherein an operation of the air blower is maintained with the current RPM when the current RPM of the air blower is greater than the low limit RPM.

Assignees

• Hyundai Motor Co Ltd

Inventors

• Kang Min Su
• Kim Sung Do
• Lee Dong Hun

Classifications

• B60W2552/15

  Road slope, i.e. the inclination of a road segment in the longitudinal direction · CPC title

• B60W30/18127

  Regenerative braking · CPC title

• B60W10/08

  including control of electric propulsion units, e.g. motors or generators · CPC title

• B60W30/18

  Propelling the vehicle · CPC title

• B60W2710/30

  Auxiliary equipments · CPC title